Transmission relearn - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

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post #1 of 15 (permalink) Old 08-21-2019, 12:17 PM Thread Starter
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Transmission relearn

Just to clarify, every time the power level is changed, need to do a relearn? Asking for a friend.


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post #2 of 15 (permalink) Old 08-21-2019, 12:19 PM
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Originally Posted by lilbxl View Post
Just to clarify, every time the power level is changed, need to do a relearn? Asking for a friend.
From my understanding yes. Unless you love going through transmissions.

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post #3 of 15 (permalink) Old 08-21-2019, 03:21 PM
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Here yah go.

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post #4 of 15 (permalink) Old 08-21-2019, 06:12 PM
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Are you talking about flashing in a new tune or changing levels with sotf switch?
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post #5 of 15 (permalink) Old 08-21-2019, 06:42 PM
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No. Only when you flash your ecm with a new tune. When you turn knob it’s advised to go easy but you don’t have to do a full fledged relearn.

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post #6 of 15 (permalink) Old 08-22-2019, 12:47 AM
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Originally Posted by nick00less View Post
No. Only when you flash your ecm with a new tune. When you turn knob itís advised to go easy but you donít have to do a full fledged relearn.
Not what I was told by Frank/Tom at RevMax. My understanding was that you had to do a relearn each time you changed tunes.

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post #7 of 15 (permalink) Old 08-22-2019, 06:52 AM
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Ofcourse because they’re covering their rear ends. Totally understand. Fact is your CVI values don’t reset. And if your driving patterns don’t change and your values don’t reset then you’ll be fine. But don’t go switching from 1 to 5 and then tearing a$$ everywhere. You don’t have to do a full blown relearn however your transmission will adapt to new power levels if your driving patterns change.

I know it sounds confusing like I’m saying the same thing.

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post #8 of 15 (permalink) Old 08-22-2019, 07:33 AM
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Originally Posted by RAC-1 View Post
Not what I was told by Frank/Tom at RevMax. My understanding was that you had to do a relearn each time you changed tunes.
Thereís a difference between changing tunes and changing power levels within a tune. Change power levels- no relearn. Have a new tune written and flash it in- relearn.
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post #9 of 15 (permalink) Old 08-22-2019, 08:59 AM Thread Starter
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Thank you all for the information. It was going to be really annoying if everytime I went to the stock tune to pull my camper I would need to do a relearn. It makes sense that if you re-flash a relearn is required. I hope the way I did the relearn will be sufficient. I have put 200 miles on the truck since tuning. I kept the throttle below 40% for over 100 miles. But I do live 9 miles outside of town, so it wasn’t all stop and go but I would slow down and let the trans down shift on the trips to town. Hopefully I’ll be ok. Again thank you all.

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post #10 of 15 (permalink) Old 08-22-2019, 12:44 PM
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Thereís a difference between changing tunes and changing power levels within a tune. Change power levels- no relearn. Have a new tune written and flash it in- relearn.
Ah, changing power levels is changing the tune....

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post #11 of 15 (permalink) Old 08-22-2019, 04:44 PM Thread Starter
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I asked my tune provider and he said I do not have to do a relearn when switching power levels.

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post #12 of 15 (permalink) Old 08-22-2019, 05:16 PM
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Quote:
Originally Posted by lilbxl View Post
I asked my tune provider and he said I do not have to do a relearn when switching power levels.
But if you don't take it easy and drive sensible allowing your transmission to relearn the extra power as nick00less mentioned you'll be back here like everyone else proclaiming the 68rfe is junk when in fact 99% of the time its owner/operator induced.

The transmission relearns as you drive it's just you don't need to do a full relearn procedure.
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